DRETOP THS-A225-I High-Low Temperature Environmental Test Chamber

Overview

The DRETOP THS-A225-I High-Low Temperature Environmental Test Chamber is an engineered precision system designed for accelerated environmental stress testing of industrial components and finished products under controlled thermal conditions. Based on forced-air convection and dual-stage compressor refrigeration architecture, the chamber delivers stable, repeatable temperature profiles across a wide operational range of –20 °C to +120 °C. Its core function is to replicate real-world thermal exposure scenarios—including thermal cycling, steady-state high/low temperature holds, and transient ramping—enabling reliability validation per international test standards such as IEC 60068-2-1 (Cold), IEC 60068-2-2 (Dry Heat), MIL-STD-810H Method 501.7 & 502.7, and ASTM D3418. The THS-A225-I is not a humidity-capable unit (i.e., it is a dry thermal chamber only); models with integrated humidity control are designated separately in the THS series (e.g., THS-A225-II). This distinction ensures optimal thermal stability and reduced condensation risk during non-humidified testing protocols.

Key Features

• Industrial-grade 7-inch full-color TFT touch screen controller with multilingual UI (English/Chinese), password-protected hierarchical access levels (administrator, engineer, operator), and audit-trail-enabled parameter logging.
• Advanced programmable logic: supports up to 1000 stored test programs, each containing up to 100 individual segments; enables complex thermal profiles including ramp-soak cycles, step transitions, and conditional branching (e.g., jump-to-step, hold-on-alarm).
• Independent PID-controlled heating and cooling circuits with auto-tuning capability—ensuring minimal overshoot, fast stabilization (<15 min after door opening), and long-term drift compensation.
• Optimized air circulation system featuring a high-efficiency centrifugal blower, asymmetric wind tunnel design, and adjustable baffle plates—validated to achieve ≤2 °C spatial uniformity across the entire 225 L working volume (600 × 500 × 750 mm).
• Dual-layer tempered safety glass observation window with integrated anti-frost heater and LED interior lighting—prevents condensation buildup and enables real-time visual monitoring without thermal disturbance.
• Robust mechanical construction: cold-rolled steel outer shell with electrostatic epoxy powder coating; 304 stainless steel inner chamber with radius-rounded corners and removable adjustable shelves; silicone rubber door gasket rated for continuous operation from –40 °C to +150 °C.
• Comprehensive safety architecture: over-temperature cut-off (independent mechanical thermostat), compressor overcurrent protection, fan failure detection, phase-loss monitoring, and ground-fault circuit interruption (GFCI).
• Standard 50 mm diameter test port (unsealed) located on the left side wall—compatible with external power, signal, or pneumatic feedthroughs for in-situ device-under-test (DUT) evaluation.

Sample Compatibility & Compliance

The THS-A225-I accommodates a broad spectrum of non-hazardous solid and assembled samples, including printed circuit boards (PCBs), automotive ECUs, LED modules, consumer electronics enclosures, polymer housings, and sensor assemblies. Its internal dimensions support standard test fixtures per IPC-TM-650 2.6.7 and JEDEC JESD22-A104E. While the chamber itself is classified as “standard” (non-explosion-proof), it complies with CE marking requirements (2014/30/EU EMC Directive and 2014/35/EU LVD Directive) and meets RoHS 2011/65/EU material restrictions. It is suitable for use in GLP-compliant laboratories when paired with validated calibration procedures traceable to NIST or equivalent national metrology institutes. Optional IQ/OQ documentation packages are available upon request to support GMP-regulated validation workflows.

Software & Data Management

The embedded controller records time-stamped temperature data at user-defined intervals (1–600 seconds) and stores up to 30 days of continuous history internally. Data export is supported via USB flash drive in CSV format compatible with Excel, MATLAB, and statistical process control (SPC) platforms. For networked environments, the chamber supports TCP/IP communication via RS485 (Modbus RTU) or optional Ethernet module, enabling integration into centralized lab management systems (LIMS) or SCADA architectures. Remote access is facilitated through DRETOP’s secure cloud platform—allowing real-time monitoring, alarm notification (email/SMS), firmware updates, and multi-user concurrent session management (up to 10 roles with granular permission sets). All remote operations comply with TLS 1.2 encryption and support 21 CFR Part 11–aligned electronic signature and audit trail functionality when configured with appropriate server-side authentication.

Applications

This chamber is routinely deployed in R&D labs, quality assurance departments, and third-party certification facilities for thermal qualification of components subjected to extreme ambient conditions. Typical use cases include: pre-conditioning of lithium-ion battery packs prior to electrical performance testing; thermal shock screening of solder joints per IPC-A-610; burn-in validation of power semiconductors; aging studies of elastomeric seals and adhesives; shelf-life assessment of medical device packaging; and environmental stress screening (ESS) of aerospace avionics per SAE ARP4754A. Its precise ramp-rate control (1–3 °C/min heating; 0.7–1 °C/min cooling) makes it particularly well-suited for simulating diurnal temperature cycles in outdoor equipment validation.

FAQ

Is the THS-A225-I certified for use in regulated pharmaceutical or medical device manufacturing environments?
It is not inherently 21 CFR Part 11–compliant out-of-the-box; however, with optional cloud service configuration, electronic signature enforcement, and documented IQ/OQ protocols, it can be validated for GxP applications.
Does this model support humidity control?
No—the THS-A225-I is a dry thermal chamber only. Humidity-capable variants are designated with suffix “-II” (e.g., THS-A225-II) and require separate specification review.
What calibration standards does DRETOP recommend for annual verification?
We recommend using NIST-traceable Class A PT100 probes with ±0.15 °C accuracy, placed at nine standardized locations per IEC 60068-3-5, with verification performed at –20 °C, 25 °C, and +120 °C.
Can the chamber operate unattended for extended durations (e.g., 72+ hours)?
Yes—its redundant safety systems, automatic power recovery after outage, and robust compressor duty cycle (rated for continuous operation) support fully autonomous long-term testing.
Is technical support available outside mainland China?
DRETOP provides English-language remote diagnostics and application engineering support globally via authorized regional partners; hardware service contracts include on-site technician dispatch where local representation exists.